From: Christoph Hellwig <hch@lst.de>
To: Damien Le Moal <dlemoal@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
Ming Lei <ming.lei@redhat.com>,
Nilay Shroff <nilay@linux.ibm.com>,
linux-block@vger.kernel.org, linux-nvme@lists.infradead.org,
nbd@other.debian.org, virtualization@lists.linux.dev,
linux-scsi@vger.kernel.org, usb-storage@lists.one-eyed-alien.net
Subject: Re: [PATCH 03/10] block: add a store_limit operations for sysfs entries
Date: Mon, 6 Jan 2025 11:57:32 +0100 [thread overview]
Message-ID: <20250106105732.GA21833@lst.de> (raw)
In-Reply-To: <a461bbbc-f251-4f44-89c7-f80f72e6e96d@kernel.org>
On Mon, Jan 06, 2025 at 07:46:19PM +0900, Damien Le Moal wrote:
> The freeze must NOT be done for the "if (entry->store_limit)" case. So this
> needs to go int the "else". Otherwise, you still have freeze the take limit
> lock order which can cause the ABBA deadlocks in SCSI sd.
That is fixed in the next patch. This one is pure refactoring without
behavior change.
next prev parent reply other threads:[~2025-01-06 10:57 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-06 10:06 RFC: fix queue freeze and limit locking order (alt take) Christoph Hellwig
2025-01-06 10:06 ` [PATCH 01/10] block: fix docs for freezing of queue limits updates Christoph Hellwig
2025-01-06 10:39 ` Damien Le Moal
2025-01-06 10:06 ` [PATCH 02/10] block: add a queue_limits_commit_update_frozen helper Christoph Hellwig
2025-01-06 10:41 ` Damien Le Moal
2025-01-06 10:06 ` [PATCH 03/10] block: add a store_limit operations for sysfs entries Christoph Hellwig
2025-01-06 10:46 ` Damien Le Moal
2025-01-06 10:57 ` Christoph Hellwig [this message]
2025-01-06 10:06 ` [PATCH 04/10] block: use queue_limits_commit_update in queue_attr_store Christoph Hellwig
2025-01-06 10:48 ` Damien Le Moal
2025-01-06 10:06 ` [PATCH 05/10] block: don't update BLK_FEAT_POLL in __blk_mq_update_nr_hw_queues Christoph Hellwig
2025-01-06 10:55 ` Damien Le Moal
2025-01-06 10:59 ` Christoph Hellwig
2025-01-06 11:01 ` Nilay Shroff
2025-01-06 11:05 ` Christoph Hellwig
2025-01-06 12:06 ` Nilay Shroff
2025-01-06 15:27 ` Christoph Hellwig
2025-01-07 7:06 ` Nilay Shroff
2025-01-06 10:06 ` [PATCH 06/10] virtio_blk: use queue_limits_commit_update_frozen in cache_type_store Christoph Hellwig
2025-01-06 10:56 ` Damien Le Moal
2025-01-06 10:59 ` Christoph Hellwig
2025-01-06 13:09 ` Damien Le Moal
2025-01-06 15:27 ` Christoph Hellwig
2025-01-06 10:06 ` [PATCH 07/10] usb-storage: use queue_limits_commit_update_frozen in max_sectors_store Christoph Hellwig
2025-01-06 10:06 ` [PATCH 08/10] nvme: freeze queue after taking limits lock Christoph Hellwig
2025-01-06 10:06 ` [PATCH 09/10] loop: document why loop_clear_limits updates queue limits without freezing Christoph Hellwig
2025-01-06 10:06 ` [PATCH 10/10] nbd: use queue_limits_commit_update_frozen in nbd_set_size Christoph Hellwig
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